期刊
FEBS LETTERS
卷 596, 期 16, 页码 2056-2071出版社
WILEY
DOI: 10.1002/1873-3468.14434
关键词
aryl hydrocarbon receptor; cyclin-dependent kinase inhibitor; transcriptional regulation; xenobiotics
资金
- Harvey H. and Donna Morre Basic Cancer Research Fellowship Award from the Linus Pauling Institute
- ARCS Foundation Scholarship
- NIH/NIEHS Training Grant [ES07060-40]
- American Cancer Society [RSG-13-132-01-CDD]
This study reveals a new regulatory cross-talk between p27(Kip1) and AhR, as p27(Kip1) interacts with AhR to negatively regulate AhR-mediated transcriptional responses. This adds to the existing knowledge that p27(Kip1) is a direct regulator of AhR transcription, providing a more comprehensive understanding of the regulatory interactions between p27(Kip1) and AhR.
p27(Kip1) functions to coordinate cell cycle progression through the inhibition of cyclin-dependent kinase (CDK) complexes. p27(Kip1) also exerts distinct activities beyond CDK-inhibition, including functioning as a transcriptional regulator. The aryl hydrocarbon receptor (AhR) is a ligand-activated transcription factor with diverse biological roles. The regulatory inputs that control AhR-mediated transcriptional responses are an active area of investigation. AhR was previously established as a direct regulator of p27(Kip1) transcription. Here, we report the physical interaction of AhR and p27(Kip1) and show that p27(Kip1) expression negatively regulates AhR-mediated transcription. p27(Kip1) knockout cells display increased AhR nuclear localisation and significantly higher expression of AhR target genes. This work thus identifies new regulatory cross-talk between p27(Kip1) and AhR.
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